Just a few months after the unveiling of the Lumia 800, Nokia is set to take the wraps off another Lumia handset, this one affectionately dubbed "Ace."

So say the folks at tech site Pocketnow.com, who have published what they say is a spec list for the forthcoming Lumia 900. On the list: a 4.3-inch high-resolution display, 512MB of RAM, an 8-megapixel camera, and the Windows Phone Mango operating system.

"Although it will almost certainly be sold carrier locked, Ace – like most modern Nokia handsets – will contain the 1700MHz band necessary for T-Mobile 3G, so we imagine that a workaround to unlock that functionality will arrive with the quickness," writes Evan Blass of Pocketnow.com. "At 160 grams [0.3 pounds], Ace weighs 18 more grams than the Lumia 800, likely due to the combination of a bigger screen and LTE radio." (To compare, the iPhone 4S weights 140 grams, still around 0.3 pounds.)